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Kinetic energy transfer in compressible isotropic turbulence
Journal of Fluid Mechanics, 2018Kinetic energy transfer in compressible isotropic turbulence is studied using numerical simulations with solenoidal forcing at turbulent Mach numbers ranging from 0.4 to 1.0 and at a Taylor Reynolds number of approximately 250. The pressure dilatation plays an important role in the local conversion between kinetic energy and internal energy, but its ...
Jianchun Wang +3 more
semanticscholar +3 more sources
Physics of Fluids, 2013
The turbulence structure and turbulence kinetic energy transport in multiscale/fractal-generated turbulence in a wind tunnel are investigated. A low-blockage, space-filling square-type (i.e., fractal elements with square shapes) fractal grid is placed at the inlet of the test section.
K. Nagata +5 more
semanticscholar +2 more sources
The turbulence structure and turbulence kinetic energy transport in multiscale/fractal-generated turbulence in a wind tunnel are investigated. A low-blockage, space-filling square-type (i.e., fractal elements with square shapes) fractal grid is placed at the inlet of the test section.
K. Nagata +5 more
semanticscholar +2 more sources
Kinetic energy and enstrophy transfer in compressible Rayleigh–Taylor turbulence
Journal of Fluid Mechanics, 2020Kinetic energy and enstrophy transfer in compressible Rayleigh–Taylor (RT) turbulence were investigated by means of direct numerical simulation. It is revealed that compressibility plays an important role in the kinetic energy and enstrophy transfer ...
Zhiye Zhao, Nan-Sheng Liu, Xi-yun Lu
semanticscholar +1 more source
Cascade of kinetic energy in three-dimensional compressible turbulence.
Physical Review Letters, 2012The conservative cascade of kinetic energy is established using both Fourier analysis and a new exact physical-space flux relation in a simulated compressible turbulence. The subgrid scale (SGS) kinetic energy flux of the compressive mode is found to be significantly larger than that of the solenoidal mode in the inertial range, which is the main ...
Jianchun Wang +5 more
semanticscholar +3 more sources
Effect of flow topology on the kinetic energy flux in compressible isotropic turbulence
Journal of Fluid Mechanics, 2019The effects of flow topology on the subgrid-scale (SGS) kinetic energy flux in compressible isotropic turbulence is studied. The eight flow topological types based on the three invariants of the filtered velocity gradient tensor are analysed at different
Jianchun Wang +6 more
semanticscholar +1 more source
Turbulent Kinetic Energy Budget in Turbulent Flow of a Dilute Polymer Solution
2023The addition of a small number of polymers to a Newtonian solvent can drastically reduce the drag in wall-bounded turbulent flows [1] due to the mechanical interaction between the polymer chains and the velocity fluctuations [2].
Serafini F. +3 more
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Turbulent Kinetic Energy Budgets over Mountainous Terrain
Journal of Applied Meteorology, 1980Abstract The objective of this study is to describe the characteristics of the airflow and turbulence structure over mountainous terrain. Turbulent characteristics of the airflow were measured using well-instrumented aircraft. The shear, buoyancy, transport of energy and eddy dissipation rate terms were obtained from direct measurements.
Theodore S. Karacostas, John D. Marwitz
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Turbulence generation through intense kinetic energy sources
Physics of Fluids, 2016Direct numerical simulations (DNS) are used to systematically study the development and establishment of turbulence when the flow is initialized with concentrated regions of intense kinetic energy. This resembles both active and passive grids which have been extensively used to generate and study turbulence in laboratories at different Reynolds numbers
Agustin F. Maqui, Diego A. Donzis
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Morning Boundary-Layer Turbulent Kinetic Energy by Theoretical Models
Boundary-Layer Meteorology, 2009A major factor that influences the diurnal variation of turbulent kinetic energy (TKE) is the sensible heat flux at the surface. Here, the TKE variations are analysed during the morning transition phase because subsequent to the neutral or stable stratification during the night, peaks of concentration of scalars develop.
Nunes AB +5 more
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Kinetic energy transfer in compressible homogeneous anisotropic turbulence
Physical Review Fluids, 2021Numerical simulations of forced anisotropic turbulence (FAT) in a periodic box and homogeneous shear turbulence (HST) at various turbulent Mach (Ma${}_{\mathrm{T}}$) and Taylor Reynolds numbers are performed to study the anisotropy of kinetic energy (KE) transfer in compressible homogeneous turbulence.
Xiaoning Wang +3 more
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